Communication Port Usage
TCP ports used by CanIT: DNS requires the server to do outbound port 53 (TCP and UDP), while NTP requires the server to do outbound port 123 (TCP and UDP). If you have made firewall changes, there may be additional services that you should adjust the firewall for. Here's more information:
Communication with external servers:
inbound port 25 mail inbound port 22 SSH administration, intra-cluster comms outbound port 53 DNS lookups outbound port 80 HTTP outbound port 443 Clam virus sigs, RPTN, s/w updates outbound port 123 UDP Network Time Protocol outbound port 6568 UDP Reputation submission
Communication with internal servers:
*in/out port 5432 Intra-cluster database traffic *in/out port 6568 Intra-cluster storage manager traffic
*outbound port 389 LDAP lookups *outbound port 636 LDAPS lookups *outbound port 110/995 POP3/POP3S lookups *outbound port 143/993 IMAP/IMAPS lookups outbound port 25 Verification server, mail delivery
Those marked with an asterisk may or may not be used depending on your configuration.